| 基于重磁场特征的敦化盆地构造格架研究 |
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| 引用本文： | 孙晖,刘万崧,王洪昌.基于重磁场特征的敦化盆地构造格架研究[J].世界地质,2012,31(1):171-178. |
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| 作者姓名： | 孙晖 刘万崧 王洪昌 |
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| 作者单位： | 1. 吉林大学地球探测科学与技术学院，长春130026; 2. 国家测绘地理信息局黑龙江基础地理信息中心，哈尔滨150081 |
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| 基金项目： | 全国油气资源战略选区调查与评价国家专项(第二批)《松辽盆地及外围上古生界油气资源战略选区》子项目之四(2009GYXQ12) |
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| 摘 要： | 依据重力、磁力异常数据及其处理结果( 水平梯度模和斜导数) ，对敦化盆地边界、基底起伏、断裂位置及以火成岩为代表的磁性体分布进行了研究。盆地重力异常的分析和水平梯度模及斜导数的计算结果表明，盆地基底具南部凹陷、中央凸起和北部凹陷的“两凹一凸”的起伏形态特征，盆地内断裂以SW--NE 向为主，盆地为单断半地堑式盆地。依据航磁异常，将盆地划分为4 个异常区: 东北部磁异常区、中部低磁异常区、西南高磁异常区和西南边部相对低磁异常区。结合磁异常水平梯度模和斜导数的计算结果显示，以火成岩为代表的磁性体受SW--NE 向构造控制。
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| 关 键 词： | 敦化盆地 重力异常 航磁异常 水平梯度模 斜导数 |
Tectonic framework of Dunhua Basin based on gravity and magnetic characteristics |
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| SUN Hui
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LIU Wan-song
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WANG Hong-chang.Tectonic framework of Dunhua Basin based on gravity and magnetic characteristics[J].World Geology,2012,31(1):171-178. |
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| Authors: | SUN Hui LIU Wan-song WANG Hong-chang |
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| Institution: | 1. College of Geo-exploration Science and Technology，Jilin University，Chunchun 130026，China; 2. Mapping and Geoinformation Heilongjiang Provincial Geomatics Center，National Administration of Surveying，Harbin 150081，China |
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| Abstract: | Based on the data of gravity and magnetic anomalies and their processing results(horizontal gradient modules and tilt derivatives),the authors study the boundary,basement relief and faults location of Dunhua Basin,and the distribution of magnetic bodies characterized by igneous rocks.The results of gravity anomaly,horizontal gradient modules and tilt derivatives reveal that the basin basement possesses two depressions(south and north)and one salient(center) in morphological characteristics;while the main faults distribute along with southwest-northwest(SW——NE) direction,and the basin presents a graben basin with a single boundary fault.The basin can be divided into four anomalous regions based on magnetic anomaly: the northeastern magnetic anomalous region,the central low magnetic anomalous region,southwastern high magnetic and relative low magnetic anomalous region.By analyzing the tilt derivatives and horizontal gradient modules of magnetic anomaly,it is shown that the distribution of the igneous rocks are controlled by SW——NE structure. |
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| Keywords: | Dunhua Basin gravity anomaly magnetic anomaly horizontal gradient module tilt derivative |
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